Leo Woods is a ten-year-old prodigy and the main protagonist of the anime series ELEMON Breakthrough. He resides in the futuristic city of New Olympia Polis, a place where the scientific marvel of Elemon—creatures born from chemical elements—has been introduced. Leo’s deepest aspiration is to become an Elemon creator, following in the footsteps of his idol, Professor World. His dream comes true when he successfully uses his invention, the Elemon Blender, to create his first Elemon, Aquro, a water-type being.

Leo possesses a naturally brilliant and inventive mind, deeply passionate about researching and creating new Elemon. He is described as positive and optimistic, holding an unwavering belief in the benevolent and constructive potential of Elemon. This hopeful outlook drives him to explore the world of chemistry and adventure, always eager to learn and discover. His primary motivation is to uncover the full secrets of Elemon and to prove that his creations can be a force for good.

In the story, Leo serves as the central figure who must protect his Elemon from the antagonistic group known as Team Ninja, which seeks to steal his technology for nefarious purposes. Throughout the series, he embarks on thrilling adventures alongside his companions, Ela and Ryan, bonding with his Elemon while learning fundamental chemistry and engaging in battles against Team Ninja. His key relationships include his close friendship with Aquro, his collaboration with Ela and Ryan, his admiration for Professor World, and his adversarial dynamic with Team Ninja.

Over the course of the narrative, Leo develops from a gifted but inexperienced inventor into a more skilled and responsible creator, facing increasingly complex scientific puzzles and formidable adversaries. His notable abilities lie in his advanced engineering and scientific knowledge, particularly his mastery of the Elemon Blender, his creativity in designing new Elemon, and his leadership in rallying his friends and Elemon to overcome challenges.